how to make background image cover whole page css code example

Example 1: css background image cover

html { 
  background: url(images/bg.jpg) no-repeat center center fixed; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

Example 2: css full cover background image

body { 
  background: url(path/to/bg-image.jpg) no-repeat center center fixed;
  background-size: cover;
}

Example 3: how to cover whole webpage by background image in html

background: url(images/bg.jpg) no-repeat center center fixed; 
  background-size: cover;

Example 4: how to cover full background with css

<div id="bg">
  <img src="images/bg.jpg" alt="">
</div>